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A nurse is preparing to administer lidocaine 50 mg IV bolus. Available is lidocaine 200 mg/mL. How many mL should the nurse administer (Round the answer to the nearest tenth. Use a leading zero if it applies. Do not use a trailing zero.)

Answer and Explanation

The Correct Answer is ["0.3"]

Calculating the Lidocaine Dose

Problem: Administer 50 mg of lidocaine IV bolus. The available concentration is 200 mg/mL.

Steps:

Set up a proportion:

We want to find the number of milliliters (mL) needed.

We know the desired dose (50 mg) and the concentration of the medication (200 mg/mL).

Proportion:

x mL / 50 mg = 1 mL / 200 mg

Cross-multiply:

200x = 50

Solve for x:

x = 50 / 200

x = 0.25

Answer: The nurse should administer 0.3 mL of lidocaine per dose(rounded to the nearest tenth).

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Free Nursing Study Resources

Correct Answer is ["10"]

Explanation

Calculating the Diphenhydramine Dose

Problem: Administer 25 mg of diphenhydramine elixir. The available concentration is 12.5 mg/5 mL.

Steps:

Set up a proportion:

We want to find the number of milliliters (mL) needed.

We know the desired dose (25 mg) and the concentration of the medication (12.5 mg/5 mL).

Proportion:

x mL / 25 mg = 5 mL / 12.5 mg

Cross-multiply:

12.5x = 125

Solve for x:

x = 125 / 12.5

x = 10

Answer: The nurse should administer 10 mL of diphenhydramine elixir per dose.

A. Epinephrine B. Atropine C. Protamine D. Vitamin K

Correct Answer is D

Explanation

A) Epinephrine:
Epinephrine is used in emergency situations such as anaphylaxis or cardiac arrest. It does not reverse the effects of anticoagulants like warfarin and is not indicated for managing an elevated INR.

B) Atropine:
Atropine is used to treat bradycardia (slow heart rate) and other conditions but does not counteract the effects of warfarin. It is not appropriate for managing an elevated INR.

C) Protamine:
Protamine is used to reverse the effects of heparin, an anticoagulant, not warfarin. It is not effective in managing high INR levels associated with warfarin therapy.

D) Vitamin K:
Vitamin K is the appropriate antidote for reversing the effects of warfarin. An INR of 5.2 indicates a high risk of bleeding, and administering Vitamin K can help to reduce the anticoagulant effects of warfarin and bring the INR back to a safer range.

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A nurse is preparing to administer lidocaine 50 mg IV bolus. Available is lidocaine 200 mg/mL. How many mL should the nurse administer (Round the answer to the nearest tenth. Use a leading zero if it applies. Do not use a trailing zero.)

Nursing Test Bank

Naxlex Comprehensive Predictor Exams

Correct Answer is ["10"]

Explanation

A nurse is caring for a client who is on warfarin therapy for atrial fibrillation. The client's INR is 5.2. Which of the following medications should the nurse prepare to administer?

Correct Answer is D

Explanation

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